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14N19 IJAET0319414 v7 iss1 122 126.pdf


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International Journal of Advances in Engineering & Technology, Mar. 2014.
©IJAET
ISSN: 22311963
The thermal decomposition of FPSN film is shown in Figure 2. (a & b). A two-step weight loss is
shown on the thermal trace (Figure 2. (a)). The first weight loss of 4.39 % from 70oC to 100oC is due
to the loss of adsorbed water molecule present in the film. The enhancement of thermal stability of the
polystyrene to higher temperature is a clear consideration for the composite formation. A second
weight loss of 72.19% ranging from 240oC to 430oC indicates the weight loss due to decomposition of
FPSN film. This weight loss is a slow process and is a multistep one. The DSC trace is shown in
figure 2(b) Two endothermic peaks with two shoulders for the main endothermic peaks are observed
at 130oC, the second peak at 430oC are due to decomposition of the FPSN film which is a slow
having a multistep process. The DSC trace shown in figure 2(b) collaborates with TGA trace shown in
figure 2(a).
Thermal Graphs
PS
100

Weight Loss

80

60

40

20

0

100

200

300

400

500

600

Temperature

Fig. 2(a)Showing the TGA graph of FPSN film

PS
300
250

Heat Flow

200
150
100
50
0
0

100

200

300

400

500

600

Temperature

Fig 2(b) showing the DSC graph of FPSN film

3.3.

Magnetic property

The M (H) curve for the FPSN film sample at room temperature is given in the table 1. The values of
saturation magnetization (Ms), remanence magnetization (Mr.) and coercivity (Hc) are 0.2 emu/g, 0.1
emu/g, and 68.18 Oe respectively. These values of pure γ-Fe2O3 are found to be11.0 emu/g, 3emu/g,
and 165.0 Oe respectively, for our samples reported [13]. An drastic decrease to a very low magnetic

124

Vol. 7, Issue 1, pp. 122-126